CN110993848A

CN110993848A - Lower shell, frame and connecting structure thereof

Info

Publication number: CN110993848A
Application number: CN201911201678.5A
Authority: CN
Inventors: 周青华; 许俊海; 钟巍
Original assignee: Guangzhou Automobile New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-04-10

Abstract

The invention discloses a lower shell, a frame and a connecting structure thereof.A first fixed edge is attached to the outer side surface of a longitudinal beam, and a second fixed edge is attached to the outer side surface of a rear cross beam; and then, the fixing pieces penetrate into the first mounting hole and the second mounting hole, and the third mounting hole and the fourth mounting hole respectively, so that the longitudinal beam is connected with the rear cross beam through the first connecting piece. After the connection between the longitudinal beam and the rear cross beam is finished, the front cross beam is matched on the longitudinal beam; then the third fixed edge is attached to the outer side face of the longitudinal beam, and the fourth fixed edge is attached to the outer side face of the front cross beam; and then, the fixing pieces penetrate into the fifth mounting hole and the sixth mounting hole and the seventh mounting hole and the eighth mounting hole respectively, so that the longitudinal beam is connected with the front cross beam through the second connecting piece. So, this scheme adopts the connection structure of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly.

Description

Lower shell, frame and connecting structure thereof

Technical Field

The invention relates to the technical field of power batteries, in particular to a lower shell, a frame and a connecting structure of the lower shell and the frame.

Background

With the increasing maturity of new energy technology, new energy automobiles gradually enter the public vision. The new energy automobile is an automobile which adopts non-traditional fuel as a power source, integrates the power control and driving technologies of the automobile and forms a new technology and a new structure. The main core technology of the new energy automobile lies in a battery module, and the safety and the stability of the battery module directly determine the performance of the whole automobile.

The battery module is mainly installed in the lower shell, so the structural quality of the lower shell directly influences the stability and the safety of the battery module. The traditional lower shell mainly comprises a frame structure and a bottom plate structure, wherein the frame structure is formed by mutually welding and connecting a front cross beam, a longitudinal beam and a rear cross beam. However, the welding connection not only causes the manufacturing process of the frame structure to become complicated, but also seriously affects the production efficiency of the lower shell; but also lead to frame structure to take place thermal deformation easily to the roughness that leads to casing down can't reach required index, and then seriously influences battery module's stability and security.

Disclosure of Invention

Therefore, a lower shell, a frame and a connecting structure thereof are needed to be provided, so that the manufacturing process of the frame can be simplified, and the production efficiency of the lower shell is improved; meanwhile, the thermal deformation of the frame is reduced, the flatness of the lower shell is guaranteed, and the stability and the safety of the battery module are improved.

The technical scheme is as follows:

a connection structure of a rim, comprising: the first connecting piece comprises a first fixing edge and a second fixing edge which are connected with each other, a first mounting hole is formed in the first fixing edge and used for being arranged opposite to a second mounting hole in the outer side face of the longitudinal beam, a third mounting hole is formed in the second fixing edge and used for being arranged opposite to a fourth mounting hole in the outer side face of the rear cross beam; and the second connecting piece comprises a third fixing edge and a fourth fixing edge which are connected with each other, a fifth mounting hole is formed in the third fixing edge, the fifth mounting hole is used for being arranged opposite to a sixth mounting hole in the outer side face of the longitudinal beam, a seventh mounting hole is formed in the fourth fixing edge, and the seventh mounting hole is used for being arranged opposite to an eighth mounting hole in the outer side face of the front cross beam.

In the frame assembling process, the longitudinal beam is matched with the rear cross beam, so that the longitudinal beam and the rear cross beam are well placed; then the first fixed edge is attached to the outer side face of the longitudinal beam, and the second fixed edge is attached to the outer side face of the rear cross beam; and then, the fixing pieces penetrate into the first mounting hole and the second mounting hole, and the third mounting hole and the fourth mounting hole respectively, so that the longitudinal beam is connected with the rear cross beam through the first connecting piece. After the connection between the longitudinal beam and the rear cross beam is finished, the front cross beam is matched on the longitudinal beam; then the third fixed edge is attached to the outer side face of the longitudinal beam, and the fourth fixed edge is attached to the outer side face of the front cross beam; and then, the fixing pieces penetrate into the fifth mounting hole and the sixth mounting hole and the seventh mounting hole and the eighth mounting hole respectively, so that the longitudinal beam is connected with the front cross beam through the second connecting piece. So, this scheme adopts the connection structure of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly. Meanwhile, the traditional welding operation is abandoned in the assembly process of the frame, the thermal deformation of the frame is reduced, and the flatness of the lower shell is guaranteed, so that the stability and the safety of the battery module are effectively improved.

The principle and effect of the invention will be further explained by combining the above scheme:

in one embodiment, the first connecting member further includes a first bearing edge, the first fixing edge and the second fixing edge are both connected to the first bearing edge, and the first bearing edge is used for bearing the longitudinal beam and the rear cross beam.

In one embodiment, the connecting structure of the side frame further includes a third connecting member, the third connecting member includes a fifth fixing edge and a sixth fixing edge which are connected to each other, the fifth fixing edge is provided with a ninth mounting hole, the ninth mounting hole is used for being arranged opposite to the tenth mounting hole on the inner side surface of the longitudinal beam, the sixth fixing edge is provided with an eleventh mounting hole, and the eleventh mounting hole is used for being arranged opposite to the twelfth mounting hole on the inner side surface of the rear cross beam.

In one embodiment, the connecting structure of the frame further includes a first sealing member and a second sealing member, the first sealing member is configured to be disposed between the first connecting member and the frame, and the second sealing member is configured to be disposed between the third connecting member and the frame.

In one embodiment, the second connecting member further includes a second bearing edge, the third fixing edge and the fourth fixing edge are both connected to the second bearing edge, and the second bearing edge is used for bearing the longitudinal beam and the front cross beam.

In one embodiment, the connecting structure of the bezel further comprises a first pre-assembly for connecting an end of the side rail and an end of the rear rail.

In one embodiment, the first package is provided with a first protrusion and a second protrusion on two opposite side surfaces, the first protrusion is used for being inserted into a first insertion hole on the longitudinal beam, and the second protrusion is used for being inserted into a second insertion hole on the rear cross beam.

In one embodiment, the first package is further provided with a first end seal for connecting between the first mounting seat of the longitudinal beam and the second mounting seat of the rear cross beam.

The utility model provides a frame, includes front beam, longeron, rear frame member and above arbitrary one the connection structure of frame, the both ends of front beam are passed through respectively the longeron with the both ends of rear frame member are connected and enclose into the chamber that holds that is used for packing into the bottom plate structure, be equipped with respectively on the lateral surface of longeron with the relative second mounting hole of first mounting hole and with the relative sixth mounting hole of fifth mounting hole, be equipped with on the lateral surface of rear frame member with the relative fourth mounting hole of third mounting hole, be equipped with on the lateral surface of front beam with the relative eighth mounting hole of seventh mounting hole.

The frame adopts the connection structure of the frame, and the longitudinal beam is matched with the rear cross beam firstly in the frame assembling process, so that the longitudinal beam and the rear cross beam are well placed; then the first fixed edge is attached to the outer side face of the longitudinal beam, and the second fixed edge is attached to the outer side face of the rear cross beam; and then, the fixing pieces penetrate into the first mounting hole and the second mounting hole, and the third mounting hole and the fourth mounting hole respectively, so that the longitudinal beam is connected with the rear cross beam through the first connecting piece. After the connection between the longitudinal beam and the rear cross beam is finished, the front cross beam is matched on the longitudinal beam; then the third fixed edge is attached to the outer side face of the longitudinal beam, and the fourth fixed edge is attached to the outer side face of the front cross beam; and then, the fixing pieces penetrate into the fifth mounting hole and the sixth mounting hole and the seventh mounting hole and the eighth mounting hole respectively, so that the longitudinal beam is connected with the front cross beam through the second connecting piece. So, this scheme adopts the connection structure of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly. Meanwhile, the traditional welding operation is abandoned in the assembly process of the frame, the thermal deformation of the frame is reduced, and the flatness of the lower shell is guaranteed, so that the stability and the safety of the battery module are effectively improved.

In one embodiment, a first mounting seat is arranged on the inner side surface of the longitudinal beam, a second mounting seat is arranged on the inner side surface of the rear cross beam, a first leading-in structure is arranged at the end part of the first mounting seat or the second mounting seat, and the first leading-in structure is used for leading in the longitudinal beam or the rear cross beam and enabling the longitudinal beam and the rear cross beam to be matched with each other.

A lower shell comprises a bottom plate structure and any one of the frames, wherein the bottom plate structure is arranged in the accommodating cavity and is connected to the front cross beam, the longitudinal beam and the rear cross beam.

The lower shell adopts the connecting structure of the frame, and the longitudinal beam is matched with the rear cross beam firstly in the frame assembling process, so that the longitudinal beam and the rear cross beam are well placed; then the first fixed edge is attached to the outer side face of the longitudinal beam, and the second fixed edge is attached to the outer side face of the rear cross beam; and then, the fixing pieces penetrate into the first mounting hole and the second mounting hole, and the third mounting hole and the fourth mounting hole respectively, so that the longitudinal beam is connected with the rear cross beam through the first connecting piece. After the connection between the longitudinal beam and the rear cross beam is finished, the front cross beam is matched on the longitudinal beam; then the third fixed edge is attached to the outer side face of the longitudinal beam, and the fourth fixed edge is attached to the outer side face of the front cross beam; and then, the fixing pieces penetrate into the fifth mounting hole and the sixth mounting hole and the seventh mounting hole and the eighth mounting hole respectively, so that the longitudinal beam is connected with the front cross beam through the second connecting piece. So, this scheme adopts the connection structure of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly. Meanwhile, the traditional welding operation is abandoned in the assembly process of the frame, the thermal deformation of the frame is reduced, and the flatness of the lower shell is guaranteed, so that the stability and the safety of the battery module are effectively improved.

Drawings

Fig. 1 is a schematic diagram of a frame structure according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a partial explosion of a frame structure according to an embodiment of the present invention;

FIG. 3 is a first partial schematic view of the longitudinal beam, the rear cross beam and the first connecting member according to an embodiment of the present invention;

FIG. 4 is a partial schematic view of the longitudinal beam, the rear cross beam and the first connecting member according to an embodiment of the present invention;

FIG. 5 is a schematic view of the longitudinal beam, the rear cross beam and the first connecting member of FIG. 4 in a partially exploded configuration;

fig. 6 is a schematic structural diagram of a first connecting element according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a third connecting member according to an embodiment of the present invention;

fig. 8 is a first schematic view illustrating the assembly of the longitudinal beam, the first package member and the rear cross member according to an embodiment of the present invention;

fig. 9 is a second schematic view illustrating the assembly of the longitudinal beam, the first package member and the rear cross member according to the embodiment of the present invention;

fig. 10 is a third schematic view of the assembly of the longitudinal beam, the first package member and the rear cross member according to the embodiment of the present invention;

fig. 11 is a first diagram illustrating a first package structure according to an embodiment of the present invention;

fig. 12 is a second schematic view of a first package structure according to an embodiment of the invention;

FIG. 13 is a schematic view of the front cross member, the longitudinal member, and the second connecting member according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a second connecting member according to an embodiment of the invention;

fig. 15 is an exploded view of the front cross member, the longitudinal member and the second package assembly according to an embodiment of the present invention;

FIG. 16 is a partial schematic view of one end of a stringer mated with a second end seal in accordance with one embodiment of the present invention;

fig. 17 is a first schematic diagram of a second package structure according to an embodiment of the present invention;

FIG. 18 is a schematic view of a stringer according to an embodiment of the present invention;

FIG. 19 is an enlarged view of a side member near a rear cross member according to an embodiment of the present invention;

FIG. 20 is an enlarged view of a structure of a longitudinal beam near a front cross member according to an embodiment of the present invention;

fig. 21 is a schematic structural diagram of a lower housing according to an embodiment of the invention.

Description of reference numerals:

100. a connecting structure of the bezel, 110, a first connecting member, 111, a first sealing member, 112, a first fixing edge, 1121, a first mounting hole, 1122, a fourth connecting hole, 113, a second fixing edge, 1131, a third mounting hole, 1132, an eighth connecting hole, 114, a first bearing edge, 115, a first notch, 120, a second connecting member, 121, a third sealing member, 122, a third fixing edge, 1221, a fifth mounting hole, 123, a fourth fixing edge, 1231, a seventh mounting hole, 124, a second bearing edge, 125, a second notch, 130, a third connecting member, 131, a second sealing member, 132, a fifth fixing edge, 1321, a ninth mounting hole, 133, a sixth fixing edge, 1331, an eleventh mounting hole, 140, a first pre-package, 141, a first connecting hole protrusion, 1411, a first connecting hole, 142, a second protrusion, 1421, a fifth connecting hole, 143, a first clamping groove, 144, a second clamping groove, 150, a second end sealing member, 151. first positioning portion 152, second positioning portion 153, first end sealing portion 154, second end sealing portion 160, second package, 161, third protrusion 162, fourth protrusion 163, third slot 164, fourth slot 170, second end sealing member 200, front beam, 210, third mounting seat 220, fourth insertion hole 230, fourth separating member 240, eighth mounting hole 300, longitudinal beam 310, first mounting seat 311, first mounting surface 3111, first glue groove 312, second mounting surface 3121, second glue groove 313, fixing seat 314, reinforcing rib 315, third positioning portion 320, first lead-in structure 321, first lead-in member 322, second lead-in member 3221, first fixing hole 323, first lead-in channel 330, second mounting hole 340, third connecting hole 350, first separating member 351, first insertion hole 352, sixth connecting

hole

352, 360. tenth mounting hole, 370, sixth mounting hole, 380, second leading-in structure, 381, third leading-in piece, 382, fourth leading-in piece, 383, second leading-in channel, 390, third separating piece, 391, third jack, 400, rear beam, 410, second mounting seat, 411, fourth positioning piece, 420, fourth mounting hole, 430, twelfth mounting hole, 440, seventh connecting hole, 450, second fixing hole, 460, second jack, 470, second separating piece, 471, second connecting hole, 500, accommodating cavity, 600, bottom plate structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

In an embodiment, referring to fig. 1, fig. 2, fig. 3, fig. 9 and fig. 13, a connecting structure 100 of a bezel includes: a first connecting member 110 and a second connecting member 120. The first connecting member 110 includes a first fixing edge 112 and a second fixing edge 113 connected to each other. The first fixing edge 112 is provided with a first mounting hole 1121. The first mounting hole 1121 is provided to face the second mounting hole 330 on the outer side surface of the side member 300. The second fixing edge 113 is provided with a third mounting hole 1131. The third mounting hole 1131 is provided to be opposed to the fourth mounting hole 420 on the outer side surface of the rear cross member 400. The second connecting member 120 includes a third fixing edge 122 and a fourth fixing edge 123 connected to each other. The third fixing edge 122 is provided with a fifth mounting hole 1221. The fifth mounting hole 1221 is provided to be opposed to the sixth mounting hole 370 on the outer side surface of the side member 300. A seventh mounting hole 1231 is formed on the fourth fixing side 123. The seventh mounting hole 1231 is provided to be opposed to the eighth mounting hole 240 on the outer side surface of the front cross member 200.

In the frame assembly process, the connecting structure 100 of the frame is firstly matched with the longitudinal beam 300 and the rear cross beam 400, so that the longitudinal beam 300 and the rear cross beam 400 are well placed; then the first fixed edge 112 is attached to the outer side surface of the longitudinal beam 300, and the second fixed edge 113 is attached to the outer side surface of the rear cross beam 400; then, the fixing members are respectively inserted into the first mounting hole 1121 and the second mounting hole 330, and the third mounting hole 1131 and the fourth mounting hole 420, so that the longitudinal beam 300 and the rear cross beam 400 are connected by the first connecting member 110. After the connection between the longitudinal beam 300 and the rear cross beam 400 is completed, the front cross beam 200 is fitted on the longitudinal beam 300; then, the third fixed edge 122 is attached to the outer side face of the longitudinal beam 300, and the fourth fixed edge 123 is attached to the outer side face of the front cross beam 200; then, the fixing members are inserted into the fifth mounting hole 1221 and the sixth mounting hole 370, and the seventh mounting hole 1231 and the eighth mounting hole 240, respectively, so that the longitudinal beam 300 and the front cross beam 200 are connected by the second connecting member 120. So, this scheme adopts connection structure 100 of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly. Meanwhile, the traditional welding operation is abandoned in the assembly process of the frame, the thermal deformation of the frame is reduced, and the flatness of the lower shell is guaranteed, so that the stability and the safety of the battery module are effectively improved.

It should be noted that, for the outer side surfaces of the longitudinal beam 300, the rear cross beam 400 and the front cross beam 200, the outer side surfaces are all opposite to the accommodating cavity 500, and the longitudinal beam 300, the rear cross beam 400 and the front cross beam 200 are sequentially connected to enclose the accommodating cavity 500, so that one side surface of the longitudinal beam 300, which faces away from the accommodating cavity 500, is the outer side surface of the longitudinal beam 300, one side surface of the rear cross beam 400, which faces away from the accommodating cavity 500, is the outer side surface of the rear cross beam 400, and one side surface of the front cross beam 200, which faces away from the accommodating cavity 500, is. On the contrary, a side of the longitudinal beam 300 facing the accommodating chamber 500 is an inner side of the longitudinal beam 300, a side of the rear cross beam 400 facing the accommodating chamber 500 is an inner side of the rear cross beam 400, and a side of the front cross beam 200 facing the accommodating chamber 500 is an inner side of the front cross beam 200.

Optionally, the fasteners are bolts, screws, pins, rivets or other fastening components. Meanwhile, the first to eighth mounting holes 1121 to 240 are all threaded holes or general round holes. If the first to eighth mounting holes 1121 to 240 are all threaded holes, in order to protect the threads of the threaded holes, threaded sleeves are usually added into the first to eighth mounting holes 1121 to 240. If the first through eighth mounting holes 1121 through 240 are all ordinary round holes, a nut or a nut is screwed on one end of the fixing member.

Further, referring to fig. 5 and fig. 6, the first connecting element 110 further includes a first carrying edge 114. The first fixing edge 112 and the second fixing edge 113 are both connected to the first bearing edge 114, and the first bearing edge 114 is used for bearing the longitudinal beam 300 and the rear cross beam 400. Therefore, when the first fixing edge 112 and the second fixing edge 113 act on the outer side surfaces of the longitudinal beam 300 and the rear cross beam 400 respectively, the longitudinal beam 300 and the rear cross beam 400 are both supported on the first supporting edge 114, so that the longitudinal beam 300 and the rear cross beam 400 are stably aligned and matched in the connection process, and the situation that the joint between the longitudinal beam 300 and the rear cross beam 400 is staggered due to no stable support is avoided. Meanwhile, when the longitudinal beam 300 is connected with the rear cross beam 400 through the first connecting piece 110, the first bearing edge 114 still abuts against the bottom surfaces of the longitudinal beam 300 and the rear cross beam 400, so that a limiting effect is formed on the bottom surfaces of the longitudinal beam 300 and the rear cross beam 400, and the longitudinal beam 300 and the rear cross beam 400 after connection are prevented from loosening or being dislocated, so that the structural stability of the frame is greatly improved.

Specifically, the first fixing edge 112, the second fixing edge 113 and the first bearing edge 114 are integrated, so that the overall structural strength of the first connecting member 110 is improved; but also simplifies the manufacturing process of the first connecting member 110 and shortens the production cycle of the first connecting member 110.

Further, referring to fig. 3 and fig. 6, a first notch 115 is left at the intersection of the first fixing edge 112, the second fixing edge 113 and the first bearing edge 114, and the first notch 115 is used for penetrating through one end of the connecting edge between the longitudinal beam 300 and the rear cross beam 400. Because the intersection of the first fixing edge 112, the second fixing edge 113 and the first bearing edge 114 is difficult to process, and the radian of the intersection is completely matched with one end of the connecting edge between the longitudinal beam 300 and the rear cross beam 400, in the assembling process, one end of the connecting edge between the longitudinal beam 300 and the rear cross beam 400 generates structural interference on the first connecting member 110 more or less, and the overall structure of the frame is unstable. Therefore, in the embodiment, the first notch 115 is left at the intersection of the first fixing edge 112, the second fixing edge 113 and the first bearing edge 114, so that one end of the connecting edge between the longitudinal beam 300 and the rear cross beam 400 extends out, thereby not only effectively solving the problem of structural interference among the first connecting member 110, the longitudinal beam 300 and the rear cross beam 400, but also making the overall structure of the frame more compact; but also reduces the processing difficulty of the first connecting piece 110, so that the first connecting piece 110 does not need high processing precision to be matched with one end of the connecting edge between the longitudinal beam 300 and the rear cross beam 400, and the production efficiency of the lower shell is greatly improved.

In one embodiment, referring to fig. 4 and 7, the connecting structure 100 of the bezel further includes a third connecting member 130. The third connecting member 130 includes a fifth fixing edge 132 and a sixth fixing edge 133 connected to each other. The fifth fixing edge 132 is provided with a ninth mounting hole 1321. The ninth mounting hole 1321 is provided to be opposed to the tenth mounting hole 360 on the inner side surface of the side member 300. An eleventh mounting hole 1331 is formed on the sixth fixing edge 133. The eleventh mounting hole 1331 is provided to be opposed to the twelfth mounting hole 430 on the inner side surface of the rear cross member 400. Therefore, the connection between the longitudinal beam 300 and the rear cross beam 400 of the present embodiment adopts a double-layer connection manner, that is, the longitudinal beam 300 is connected with the outer side surface of the rear cross beam 400 through the first connecting member 110; and the longitudinal beam 300 is connected to the inner side surface of the rear cross beam 400 by the third connecting member 130. So for longeron 300 is connected more stably with rear frame member 400, has promoted the bearing capacity on longeron 300 and the rear frame member 400 greatly, thereby makes casing overall structure intensity effectively promote down, and then guarantees battery module's stability and security.

It should be noted that, the inner side surface of longitudinal beam 300 and the inner side surface of rear cross beam 400 are both relative to accommodating cavity 500, and since longitudinal beam 300, rear cross beam 400 and front cross beam 200 are connected in sequence and can be enclosed to form accommodating cavity 500, one side surface of longitudinal beam 300 facing accommodating cavity 500 is the inner side surface of longitudinal beam 300, and one side surface of rear cross beam 400 facing accommodating cavity 500 is the inner side surface of rear cross beam 400.

Optionally, the ninth mounting hole 1321 to the twelfth mounting hole 430 are all threaded holes or common round holes. If the ninth mounting hole 1321 to the twelfth mounting hole 430 are all threaded holes, in order to protect the threads of the threaded holes, thread inserts are usually added into the ninth mounting hole 1321 to the twelfth mounting hole 430. If the ninth through twelfth mounting holes 1321 through 430 are all ordinary round holes, a nut or a nut is screwed on one end of the fixing member.

Further, referring to fig. 5, the frame connecting structure 100 further includes a first sealing member 111 and a second sealing member 131. The first sealing member 111 is configured to be disposed between the first connecting member 110 and the bezel. The second sealing member 131 is configured to be disposed between the third connecting member 130 and the bezel. Therefore, the first sealing element 111 and the second sealing element 131 respectively and correspondingly fill the gap between the first connecting element 110 and the frame and the gap between the third connecting element 130 and the frame, so that the inner side and the outer side of the frame are effectively sealed, and the air tightness of the frame is effectively improved.

Specifically, the first seal 111 is provided between the first fixed edge 112 and the outer side surface of the side member 300 and between the second fixed edge 113 and the outer side surface of the rear cross member 400, and the second seal 131 is provided between the fifth fixed edge 132 and the inner side surface of the side member 300 and between the sixth fixed edge 133 and the inner side surface of the rear cross member 400.

Furthermore, the first sealing element 111 and the second sealing element 131 are both structural adhesives, and the structural adhesives are uniformly coated on the first connecting element 110 and the third connecting element 130 during the frame assembling process. Meanwhile, the structural adhesive is also beneficial to enhancing the binding force between the first connecting piece 110 and the frame and between the third connecting piece 130 and the frame. Specifically, in this embodiment, before the glue is applied, the first connecting member 110, the third connecting member 130, the rear cross member 400, and the longitudinal member 300 are respectively subjected to surface anodization to increase the adhesive force of the structural glue. Wherein, the structural adhesive can be a single-component epoxy adhesive or a double-component epoxy adhesive, such as: BM 1840C, BM2090, and so on. The specific gluing process comprises the following steps: the loose oxide film on the surface of the workpiece needs to be polished; after polishing, coating structural adhesive, and curing by heating or room temperature; after curing, a baking process can be carried out, so that the performance of the structural adhesive is more stable.

In one embodiment, referring to fig. 2, a third sealing member 121 is also disposed between the second connecting member 120 and the frame, so that the second connecting member 120 and the frame are in sealing engagement. Specifically, in the embodiment, the third sealing element 121 is structural adhesive, and before the adhesive is applied, the second connecting member 120, the front cross member 200, and the longitudinal member 300 are respectively subjected to surface anodization to increase the adhesive force of the structural adhesive.

In one embodiment, referring to fig. 2, 13 and 14, the second connecting member 120 further includes a second carrying edge 124. The third fixing edge 122 and the fourth fixing edge 123 are both connected to the second carrying edge 124. The second bearing edge 124 is used for bearing the longitudinal beam 300 and the front cross beam 200. Therefore, when the third fixing edge 122 and the fourth fixing edge 123 act on the outer side surfaces of the longitudinal beam 300 and the front cross beam 200 respectively, the longitudinal beam 300 and the front cross beam 200 are both supported on the second supporting edge 124, so that the longitudinal beam 300 and the front cross beam 200 are stably aligned and matched in the connection process, and the situation that the joint between the longitudinal beam 300 and the front cross beam 200 is staggered due to no stable support is avoided. Meanwhile, when the longitudinal beam 300 is connected with the front cross beam 200 through the second connecting piece 120, the second bearing edge 124 still butts against the bottom surfaces of the longitudinal beam 300 and the front cross beam 200, so that a limiting effect is formed on the bottom surfaces of the longitudinal beam 300 and the front cross beam 200, and the longitudinal beam 300 and the front cross beam 200 after connection are guaranteed not to be loosened or dislocated, so that the structural stability of the frame is greatly improved.

Specifically, the third fixing edge 122, the fourth fixing edge 123 and the second bearing edge 124 are integrated, so that the overall structural strength of the second connecting member 120 is improved; but also simplifies the manufacturing process of the second connector 120 and shortens the production cycle of the second connector 120.

Further, referring to fig. 13 and 14, a second notch 125 is left at the intersection of the third fixing edge 122, the fourth fixing edge 123 and the second bearing edge 124, and the second notch 125 is used for penetrating through one end of the connecting edge between the longitudinal beam 300 and the front cross beam 200. Therefore, in the embodiment, the second notch 125 is left at the intersection of the third fixed edge 122, the fourth fixed edge 123 and the second bearing edge 124, so that one end of the connecting edge between the longitudinal beam 300 and the front cross beam 200 extends out, thereby not only effectively solving the problem of structural interference among the second connecting piece 120, the longitudinal beam 300 and the front cross beam 200, but also making the overall structure of the frame more compact; but also reduces the processing difficulty of the second connecting piece 120, so that the second connecting piece 120 does not need high processing precision to match with one end of the connecting edge between the longitudinal beam 300 and the front cross beam 200, and the production efficiency of the lower shell is greatly improved.

In one embodiment, referring to fig. 5, the connecting structure 100 of the side frame further includes a first pre-assembly 140, and the first pre-assembly 140 is used for connecting an end of the longitudinal beam 300 and an end of the rear cross beam 400. It can be seen that, before the first connecting member 110 is connected to the longitudinal beam 300 and the rear cross beam 400, the end of the longitudinal beam 300 is connected to the end of the rear cross beam 400 through the first pre-assembly 140, so that the longitudinal beam 300 and the rear cross beam 400 are pre-shaped, and the connecting operation of the first connecting member 110 on the longitudinal beam 300 and the rear cross beam 400 is greatly facilitated. Meanwhile, through the first package component 140, the longitudinal beam 300 and the rear cross beam 400 are always kept in an aligned state in the connection process, and the longitudinal beam 300 and the rear cross beam 400 are prevented from shifting or sliding in the connection process, so that the assembly precision of the frame is greatly improved, and the production quality of the lower shell is improved. In addition, through first subassembly 140 for the tip of longeron 300 and the tip of back crossbeam 400 are all effectively sealed, thereby independently open longeron 300 and a plurality of inside cavities of back crossbeam 400, avoid intaking because of one of them cavity in longeron 300 and the back crossbeam 400 and leading to all intaking in the whole cavity, so, are favorable to improving the waterproof performance of frame.

Alternatively, the first package 140 may be bonded, bolted, riveted, or otherwise connected to the end of the longitudinal beam 300 and the end of the rear cross beam 400, respectively.

Specifically, a structural adhesive is applied between one side surface of the first package 140 and the end of the longitudinal beam 300, and a structural adhesive is also applied between the other side surface of the first package 140 and the end of the rear cross beam 400.

Further, referring to fig. 5, 8 and 10, a first protrusion 141 and a second protrusion 142 are respectively disposed on two opposite sides of the first package 140. The first protrusion 141 is configured to be inserted into the first insertion hole 351 of the longitudinal beam 300. The second protrusion 142 is adapted to be inserted into a second receptacle 460 on the rear cross member 400. It can thus be seen that during the connection of the first subassembly 140, the first protrusion 141 is first inserted into the first receptacle 351 so that the first subassembly 140 is positioned on the stringer 300; then, the second protrusion 142 is inserted into the second insertion hole 460, so that the rear cross beam 400, the first package component 140 and the longitudinal beam 300 are all positioned, a stable frame structure is provided for the subsequent connection operation of the first connecting component 110, and the subsequent connection operation is facilitated. Of course, in other embodiments, the first package 140 may be provided with a socket structure, and the longitudinal beam 300 and the rear cross beam 400 are provided with a protrusion structure, respectively, to achieve the positioning among the first package 140, the rear cross beam 400 and the longitudinal beam 300.

Specifically, the first package 140, the first protrusion 141 and the second protrusion 142 are integrated, so that the manufacturing process is greatly simplified, and the production cycle is shortened. At the same time, it is also advantageous to improve the structural strength of the first package 140.

Further, referring to fig. 9 and 12, a first divider 350 is disposed in the longitudinal beam 300, and the first divider 350 divides the longitudinal beam 300 into two or more first insertion holes 351. The number of the first protrusions 141 is two or more, the two or more first protrusions 141 are arranged on the first package 140 at intervals, a first clamping groove 143 is formed between two adjacent first protrusions 141 and the first package 140, and when the first protrusions 141 are inserted into the first insertion holes 351, the first separating member 350 is clamped into the first clamping groove 143, so that the longitudinal beam 300 and the first package 140 are mutually interwoven and matched, and the binding force between the first package 140 and the longitudinal beam 300 is greatly improved.

In one embodiment, referring to fig. 10 and 11, a second spacer 470 is disposed in the rear cross member 400, and the second spacer 470 divides the interior of the rear cross member 400 into two or more second insertion holes 460. The number of the second protrusions 142 is two or more, the two or more second protrusions 142 are arranged on the first package 140 at intervals, the second locking groove 144 is formed between two adjacent second protrusions 142 and the first package 140, and when the second protrusions 142 are inserted into the second insertion holes 460, the second spacer 470 is locked into the second locking groove 144, so that the rear cross beam 400 and the first package 140 are interlaced and matched with each other, and the bonding force between the first package 140 and the rear cross beam 400 is greatly improved.

Further, referring to fig. 10, the first protrusion 141 is disposed opposite to the second engaging groove 144. The first protrusion 141 is provided with a first connection hole 1411, the first connection hole 1411 penetrates through the groove bottom of the second locking groove 144, and the second partition 470 is provided with a second connection hole 471 opposite to the first connection hole 1411. It can be seen that when the second protrusion 142 is inserted into the second insertion hole 460 and the second spacer 470 is snapped into the second snap groove 144, the fixing member penetrates into the first connection hole 1411 and the second connection hole 471, respectively, so that the first package 140 is stably connected to the rear cross member 400. The fixing piece can be a bolt, a screw, a pin, a rivet or other fixing parts.

Further, referring to fig. 10, the longitudinal beam 300 is further provided with a third connection hole 340 opposite to the first connection hole 1411. After the pre-forming of the rear cross member 400, the first pre-assembly 140 and the longitudinal member 300 is completed, the operator may insert the fixing member into the third connecting hole 340, the first connecting hole 1411 and the second connecting hole 471, respectively, to complete the pre-forming operation among the rear cross member 400, the first pre-assembly 140 and the longitudinal member 300. In the embodiment, the first fixing edge 112 is provided with the fourth connecting hole 1122 opposite to the third connecting hole 340, so that the preformed fixing operation can be performed together with the connecting operation of the first connecting member 110, and the assembling period of the frame is greatly saved.

In one embodiment, referring to fig. 9, the second protrusion 142 is disposed opposite to the first locking groove 143. The second protrusion 142 is provided with a fifth connecting hole 1421, the fifth connecting hole 1421 penetrates through the bottom of the first slot 143, and the first separator 350 is provided with a sixth connecting hole 352 opposite to the fifth connecting hole 1421. It can be seen that when the first protrusion 141 is inserted into the first receptacle 351 and the first spacer 350 is snapped into the first snap groove 143, the fixing members are inserted into the fifth connecting hole 1421 and the sixth connecting hole 352, respectively, so that the first package 140 is stably connected to the longitudinal beam 300.

Further, referring to fig. 9, the rear cross member 400 is further provided with a seventh connecting hole 440 opposite to the fifth connecting hole 1421. After the pre-forming of the rear cross member 400, the first pre-assembly 140 and the longitudinal member 300 is completed, the operator may insert the fixing member into the seventh connecting hole 440, the fifth connecting hole 1421 and the sixth connecting hole 352, respectively, to complete the pre-forming operation among the rear cross member 400, the first pre-assembly 140 and the longitudinal member 300. In this embodiment, the eighth connection hole 1132 is disposed on the second fixing edge 113 opposite to the seventh connection hole 440, so that the preformed fixing operation can be performed in the subsequent connection operation, and the assembly period of the frame is greatly reduced. The fixing piece can be a bolt, a screw, a pin, a rivet or other fixing parts.

In one embodiment, referring to fig. 5, 8 and 12, the first package 140 further has a first end seal 150 disposed thereon. The first end seal 150 is adapted to be coupled between the first mount 310 of the side member 300 and the second mount 410 of the rear cross member 400. In this way, the first mounting seat 310 on the longitudinal beam 300 is tightly combined with the second mounting seat 410 of the rear cross beam 400 through the first end seal 150. The first and second mounting

seats

310 and 410 are used for mounting the bottom plate structure 600.

Further, referring to fig. 12, the first end seal 150 includes a first end seal 153 and a second end seal 154, the second end seal 154 is connected to the first package 140 through the first end seal 153, the first end seal 153 is used for connecting between an end of the first mounting seat 310 and an end of the second mounting seat 410, and the second end seal 154 is used for connecting between an end of the first mounting seat 310 and a side of the second mounting seat 410 away from the rear cross member 400. In this way, the first and second mounting

seats

310 and 410 are combined more tightly.

Optionally, the first end seal 153 is connected between the end of the first mounting seat 310 and the end of the second mounting seat 410 by bonding, bolting, riveting or other methods; the second end seal 154 is connected between the end of the first mounting base 310 and one side of the second mounting base 410 by bonding, bolting, riveting or other means.

Specifically, referring to fig. 8 and 12, the first end sealing portion 153 is connected between the end of the first mounting base 310 and the end of the second mounting base 410 through a structural adhesive, and the second end sealing portion 154 is also connected between the end of the first mounting base 310 and one side of the second mounting base 410 through a structural adhesive.

In one embodiment, referring to fig. 9 and fig. 10, a first positioning portion 151 and a second positioning portion 152 are respectively disposed on two opposite sides of the first end seal 150, the first positioning portion 151 is used for positioning and matching with the third positioning portion 315 on the longitudinal beam 300, and the second positioning portion 152 is used for positioning and matching with the fourth positioning portion 411 of the rear cross beam 400. Therefore, in the connection process of the first end seal 150, the first positioning portion 151 and the third positioning portion 315 are firstly positioned and matched, so that the first end seal 150 is positioned on the longitudinal beam 300; then, the second positioning portion 152 and the fourth positioning portion 411 are positioned and matched, so that the first mounting seat 310, the first end seal 150 and the second mounting seat 410 are all effectively positioned, and the first mounting seat 310, the first end seal 150 and the second mounting seat 410 are combined more tightly.

Optionally, the first positioning portion 151 is a bump structure, and the third positioning portion 315 is a groove structure; alternatively, the first positioning portion 151 is a groove structure, and the third positioning portion 315 is a bump structure. Similarly, the second positioning portion 152 is a bump structure, and the fourth positioning portion 411 is a groove structure; alternatively, the second positioning portion 152 is a groove structure, and the fourth positioning portion 411 is a bump structure.

In one embodiment, referring to fig. 15, the connecting structure 100 of the side frame further includes a second pre-assembly 160, and the second pre-assembly 160 is used for connecting the end of the longitudinal beam 300 and the end of the front cross beam 200. Therefore, before the second connecting piece 120 is connected to the longitudinal beam 300 and the front cross beam 200, the end part of the longitudinal beam 300 is connected to the end part of the front cross beam 200 through the second pre-assembly 160, so that the longitudinal beam 300 and the front cross beam 200 are pre-shaped, and the connecting operation of the second connecting piece 120 on the longitudinal beam 300 and the front cross beam 200 is greatly facilitated. Meanwhile, through the second package component 160, the longitudinal beam 300 and the front cross beam 200 are always kept in an aligned state in the connection process, and the longitudinal beam 300 and the front cross beam 200 are prevented from shifting or sliding in the connection process, so that the assembly precision of the frame is greatly improved, and the production quality of the lower shell is improved. In addition, through second subassembly 160 for the tip of longeron 300 and the tip of front beam 200 all are effectively sealed, thereby independently open longeron 300 and a plurality of inside cavities of front beam 200, avoid intaking because of one of them cavity in longeron 300 and the front beam 200 and leading to all intaking in the whole cavity, so, be favorable to improving the waterproof performance of frame.

Alternatively, the second package 160 may be connected to the end of the longitudinal beam 300 and the end of the front cross beam 200 by bonding, bolting, riveting or other connection methods.

Specifically, a structural adhesive is applied between one side surface of the second package 160 and the end of the longitudinal beam 300, and a structural adhesive is also applied between the other side surface of the second package 160 and the end of the front cross beam 200.

Further, referring to fig. 15 and 17, a third protrusion 161 and a fourth protrusion 162 are respectively disposed on two opposite sides of the second package 160. The third protrusion 161 is adapted to be inserted into a third insertion hole 391 on the longitudinal beam 300. The fourth protrusion 162 is configured to be inserted into the fourth receptacle 220 of the front beam 200. It follows that during the connection of the second subassembly 160, the third protrusion 161 is first inserted into the third receptacle 391, so that the second subassembly 160 is positioned on the stringer 300; then, the fourth protrusion 162 is inserted into the fourth insertion hole 220, so that the front cross beam 200, the second package member 160 and the longitudinal beam 300 are all positioned, a stable frame structure is provided for the subsequent connection operation of the second connection member 120, and the subsequent connection operation is facilitated. Of course, in other embodiments, the second subassembly 160 may be provided with a socket structure, and the longitudinal beam 300 and the front cross beam 200 may be provided with a protrusion structure, respectively, to achieve the positioning among the second subassembly 160, the front cross beam 200, and the longitudinal beam 300.

Specifically, the second package 160, the third protrusion 161 and the fourth protrusion 162 are integrated, so that the manufacturing process is greatly simplified and the production cycle is shortened. At the same time, it is also advantageous to improve the structural strength of the second package 160.

Further, referring to fig. 15, 18 and 20, a third partition 390 is disposed in the longitudinal beam 300, and the third partition 390 divides the longitudinal beam 300 into two or more third insertion holes 391. The number of the third protrusions 161 is two or more, the two or more third protrusions 161 are spaced apart from each other on the second package 160, a third catching groove 163 is formed between two adjacent third protrusions 161 and the second package 160, and when the third protrusions 161 are inserted into the third catching holes 391, the third divider 390 is caught in the third catching groove 163, so that the longitudinal beam 300 and the second package 160 are interfolded with each other, and the coupling force between the second package 160 and the longitudinal beam 300 is greatly improved.

In one embodiment, referring to fig. 2 and 15, a fourth spacer 230 is disposed in the front beam 200, and the fourth spacer 230 divides the front beam 200 into more than two fourth insertion holes 220. The number of the fourth protrusions 162 is two or more, the two or more fourth protrusions 162 are spaced apart from each other on the second package 160, a fourth locking groove 164 is formed between two adjacent fourth protrusions 162 and the second package 160, and when the fourth protrusions 162 are inserted into the fourth insertion holes 220, the fourth separating member 230 is locked into the fourth locking groove 164, so that the front cross beam 200 and the second package 160 are interfolded with each other, and the coupling force between the second package 160 and the front cross beam 200 is greatly improved.

In one embodiment, referring to fig. 15 and 16, the connecting structure 100 of the bezel further includes a second end seal 170, and the second end seal 170 is used for sealing an end of the first mounting seat 310. In this way, the end of the first mount 310 is effectively sealed; meanwhile, the structures of the pre-assembled longitudinal beam 300 and the front cross beam 200 are more compact. The end of the second end seal 170 and the end of the first mounting seat 310 may be bonded, bolted, riveted, or otherwise connected. Specifically, in the present embodiment, the second end seal 170 is connected to the end of the first mounting seat 310 by structural adhesive.

Alternatively, the second end seal 170 may be a separate component, not connected to the second package 160; of course, in other embodiments, the second package 160 may be connected as a unitary structure.

In one embodiment, referring to fig. 1, fig. 2, fig. 3, fig. 9 and fig. 13, a side frame includes a front cross member 200, a longitudinal member 300, a rear cross member 400 and the connecting structure 100 of the side frame in any one of the above embodiments. Both ends of the front cross member 200 are connected to both ends of the rear cross member 400 through the longitudinal members 300, respectively, and enclose an accommodating chamber 500 for accommodating the floor structure 600. The outer side surfaces of the longitudinal beams 300 are respectively provided with second mounting holes 330 facing the first mounting holes 1121 and sixth mounting holes 370 facing the fifth mounting holes 1221. A fourth mounting hole 420 is provided on the outer side surface of the rear cross member 400 to face the third mounting hole 1131. An eighth mounting hole 240 is provided on the outer side surface of the front cross member 200 to face the seventh mounting hole 1231.

The frame adopts the frame connecting structure 100, and in the frame assembling process, the longitudinal beam 300 is matched with the rear cross beam 400, so that the longitudinal beam 300 and the rear cross beam 400 are placed well; then the first fixed edge 112 is attached to the outer side surface of the longitudinal beam 300, and the second fixed edge 113 is attached to the outer side surface of the rear cross beam 400; then, the fixing members are respectively inserted into the first mounting hole 1121 and the second mounting hole 330, and the third mounting hole 1131 and the fourth mounting hole 420, so that the longitudinal beam 300 and the rear cross beam 400 are connected by the first connecting member 110. After the connection between the longitudinal beam 300 and the rear cross beam 400 is completed, the front cross beam 200 is fitted on the longitudinal beam 300; then, the third fixed edge 122 is attached to the outer side face of the longitudinal beam 300, and the fourth fixed edge 123 is attached to the outer side face of the front cross beam 200; then, the fixing members are inserted into the fifth mounting hole 1221 and the sixth mounting hole 370, and the seventh mounting hole 1231 and the eighth mounting hole 240, respectively, so that the longitudinal beam 300 and the front cross beam 200 are connected by the second connecting member 120. So, this scheme adopts connection structure 100 of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly. Meanwhile, the traditional welding operation is abandoned in the assembly process of the frame, the thermal deformation of the frame is reduced, and the flatness of the lower shell is guaranteed, so that the stability and the safety of the battery module are effectively improved.

Further, referring to fig. 18, 19 and 20, a first mounting seat 310 is disposed on an inner side surface of the longitudinal beam 300. A second mounting seat 410 is provided on the inner side surface of the rear cross member 400. A first lead-in structure 320 is arranged at an end of the first mounting seat 310 or the second mounting seat 410, and the first lead-in structure 320 is used for leading in the longitudinal beam 300 or the rear cross beam 400 and enabling the longitudinal beam 300 and the rear cross beam 400 to be matched with each other. Therefore, in the aligning and matching process of the rear cross beam 400 and the longitudinal beam 300, the rear cross beam 400 or the longitudinal beam 300 is moved in a preset track through the first guide-in structure 320, and the rear cross beam 400 and the longitudinal beam 300 are matched with each other, so that the connection operation between the longitudinal beam 300 and the rear cross beam 400 is greatly facilitated, and the improvement of the assembling efficiency of the frame is facilitated. Meanwhile, the first guiding structure 320 is also beneficial to improving the alignment precision between the longitudinal beam 300 and the rear cross beam 400, so that the assembled frame structure is more stable.

The first lead-in structure 320 of the present embodiment may be disposed at an end of the first mounting seat 310, or may be disposed at an end of the second mounting seat 410. When the first introduction structure 320 is provided on the end of the first mount 310, the rear cross member 400 is introduced through the first introduction structure 320, and the rear cross member 400 is engaged with the side member 300; when the first introduction structure 320 is provided on the end of the second mount 410, the side member 300 is introduced through the first introduction structure 320, and the side member 300 is engaged with the rear cross member 400.

Further, referring to fig. 19, the first lead-in structure 320 includes a first lead-in 321 and a second lead-in 322, and the second lead-in 322 is connected to an end of the first mounting base 310 or an end of the second mounting base 410 through the first lead-in 321. The first or

second mount

310 or 410, the first and

second introduction members

321 and 322 enclose a first introduction passage 323, and the first introduction passage 323 is used to pass through the side member 300 or the rear cross member 400. Therefore, the first lead-in structure 320 is in an "L" shape or approximately in an "L" shape, and when aligned and matched, the longitudinal beam 300 or the rear cross beam 400 passes through the first lead-in channel 323, so that the longitudinal beam 300 or the rear cross beam 400 moves along a preset track, and the longitudinal beam 300 and the rear cross beam 400 are accurately matched.

Specifically, the second lead-in member 322 is connected to the end of the first mounting seat 310 through the first lead-in member 321, and the second lead-in member 322 is provided with a first fixing hole 3221, and the outer side surface of the rear cross member 400 is provided with a second fixing hole 450 opposite to the first fixing hole 3221, so that when the rear cross member 400 is aligned with the longitudinal member 300, the fixing members are respectively inserted into the first fixing hole 3221 and the second fixing hole 450, so that the rear cross member 400 is stably fixed to the longitudinal member 300.

In one embodiment, referring to fig. 19, the first mounting seat 310 is provided with a first mounting surface 311 and a second mounting surface 312, a bottom of the first mounting seat 310 opposite to the first mounting seat 311 is higher than the second mounting surface 312, and the first mounting surface 311 and the second mounting surface 312 are respectively used for mounting a double-layer mounting surface in the bottom plate structure 600. Therefore, the first mounting surface 311 and the second mounting surface 312 are distributed in a step-type manner, and one of the mounting surfaces is mounted on the second mounting surface 312 in the lower housing assembling process; and the other mounting surface is mounted on the first mounting surface 311, so that the bottom plate structure 600 of the lower shell has double-layer connection, the protection performance of the lower shell is greatly improved, and the air tightness failure of the lower shell caused by the damage of one mounting surface of the bottom plate structure 600 is avoided.

Further, referring to fig. 19, a first glue groove 3111 is disposed on the first mounting surface 311, and a second glue groove 3121 is disposed on the second mounting surface 312, so that when the bottom plate structure 600 is mounted, glue is filled into the first glue groove 3111 and the second glue groove 3121, respectively, so that the bottom plate structure 600 is more stably mounted on the frame.

In one embodiment, referring to fig. 19, a reinforcing rib 314 is disposed between the first mounting seat 310 and the longitudinal beam 300, so that the connection between the first mounting seat 310 and the longitudinal beam 300 is more stable, and the structural strength of the frame is effectively improved. Specifically, in the present embodiment, the reinforcing ribs 314 are provided along the longitudinal direction of the side member 300.

In one embodiment, referring to fig. 19, the first mounting seat 310 is provided with a fixing seat 313, and the fixing seat 313 is used for fixing the battery module. In the embodiment, the number of the fixing seats 313 is two or more, and the two or more fixing seats 313 are spaced apart from each other on the first mounting seat 310, so that the battery module is more stably mounted.

In one embodiment, referring to fig. 2, 15 and 20, a third mounting seat 210 is disposed on an inner side surface of the front cross member 200. A second lead-in structure 380 is disposed on an end of the first mounting seat 310 or the third mounting seat 210, and the second lead-in structure 380 is used for leading in the longitudinal beam 300 or the front cross beam 200 and enabling the longitudinal beam 300 and the front cross beam 200 to be matched with each other. Therefore, in the alignment and matching process of the front cross beam 200 and the longitudinal beam 300, the front cross beam 200 or the longitudinal beam 300 is moved in a preset track through the second lead-in structure 380, and the front cross beam 200 and the longitudinal beam 300 are matched with each other, so that the connection operation between the longitudinal beam 300 and the front cross beam 200 is greatly facilitated, and the improvement of the assembly efficiency of the frame is facilitated. Meanwhile, the second guiding structure 380 is also beneficial to improving the alignment precision between the longitudinal beam 300 and the front cross beam 200, so that the assembled frame structure is more stable.

It should be noted that the second lead-in structure 380 of the present embodiment may be disposed at an end of the first mounting seat 310, or may be disposed at an end of the third mounting seat 210. When the second introduction structure 380 is provided on the end of the first mount 310, the front cross member 200 is introduced through the second introduction structure 380, and the front cross member 200 is engaged with the side member 300; when the second introduction structure 380 is provided on the end of the third mount 210, the side member 300 is introduced through the second introduction structure 380, and the side member 300 is engaged with the front cross member 200.

Further, referring to fig. 20, the second lead-in structure 380 includes a third lead-in 381 and a fourth lead-in 382, and the fourth lead-in 382 is connected to an end of the first mounting seat 310 or an end of the third mounting seat 210 through the third lead-in 381. The first mounting seat 310 or the third mounting seat 210, the third lead-in member 381, and the fourth lead-in member 382 enclose a second lead-in channel 383, and the second lead-in channel 383 is used for passing through the longitudinal beam 300 or the front cross beam 200. Therefore, the second lead-in structure 380 is in an "L" shape or approximately in an "L" shape, and when aligned and matched, the longitudinal beam 300 or the front cross beam 200 passes through the second lead-in channel 383, so that the longitudinal beam 300 or the front cross beam 200 moves along a preset track, and the longitudinal beam 300 is accurately matched with the front cross beam 200.

Specifically, the fourth lead-in member 382 is connected to the end of the first mounting seat 310 through the third lead-in member 381, and the fourth lead-in member 382 is provided with a first fixing hole 3221, and the outer side surface of the front cross member 200 is provided with a second fixing hole 450 opposite to the first fixing hole 3221, so that when the front cross member 200 is aligned with the longitudinal member 300, the fixing members are respectively inserted into the first fixing hole 3221 and the second fixing hole 450, so that the front cross member 200 is stably fixed to the longitudinal member 300.

In one embodiment, referring to fig. 1, fig. 2, fig. 3, fig. 9, fig. 13 and fig. 21, a lower housing includes a bottom plate structure 600 and a frame in any of the above embodiments. The floor structure 600 is housed in the housing cavity 500 and is connected to the front cross member 200, the side members 300, and the rear cross member 400.

The lower shell adopts the frame connecting structure 100, and in the frame assembling process, the longitudinal beam 300 is matched with the rear cross beam 400, so that the longitudinal beam 300 and the rear cross beam 400 are placed well; then the first fixed edge 112 is attached to the outer side surface of the longitudinal beam 300, and the second fixed edge 113 is attached to the outer side surface of the rear cross beam 400; then, the fixing members are respectively inserted into the first mounting hole 1121 and the second mounting hole 330, and the third mounting hole 1131 and the fourth mounting hole 420, so that the longitudinal beam 300 and the rear cross beam 400 are connected by the first connecting member 110. After the connection between the longitudinal beam 300 and the rear cross beam 400 is completed, the front cross beam 200 is fitted on the longitudinal beam 300; then, the third fixed edge 122 is attached to the outer side face of the longitudinal beam 300, and the fourth fixed edge 123 is attached to the outer side face of the front cross beam 200; then, the fixing members are inserted into the fifth mounting hole 1221 and the sixth mounting hole 370, and the seventh mounting hole 1231 and the eighth mounting hole 240, respectively, so that the longitudinal beam 300 and the front cross beam 200 are connected by the second connecting member 120. So, this scheme adopts connection structure 100 of frame, replaces traditional welding mode for the equipment of frame becomes simpler, convenient, has improved the production efficiency of casing down greatly. Meanwhile, the traditional welding operation is abandoned in the assembly process of the frame, the thermal deformation of the frame is reduced, and the flatness of the lower shell is guaranteed, so that the stability and the safety of the battery module are effectively improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A connection structure of a frame, comprising:

the first connecting piece comprises a first fixing edge and a second fixing edge which are connected with each other, a first mounting hole is formed in the first fixing edge and used for being arranged opposite to a second mounting hole in the outer side face of the longitudinal beam, a third mounting hole is formed in the second fixing edge and used for being arranged opposite to a fourth mounting hole in the outer side face of the rear cross beam; and

the second connecting piece, the second connecting piece includes interconnect's the fixed limit of third and the fixed limit of fourth, be equipped with the fifth mounting hole on the fixed limit of third, the fifth mounting hole be used for with the sixth mounting hole on the lateral surface of longeron sets up relatively, be equipped with the seventh mounting hole on the fixed limit of fourth, the seventh mounting hole be used for with the relative setting of eighth mounting hole on the lateral surface of front beam.

2. The frame connecting structure according to claim 1, wherein the first connecting member further includes a first bearing edge, the first fixing edge and the second fixing edge are both connected to the first bearing edge, and the first bearing edge is used for bearing the longitudinal beam and the rear cross beam.

3. The connecting structure of the side frame according to claim 1, further comprising a third connecting member, wherein the third connecting member includes a fifth fixing edge and a sixth fixing edge that are connected to each other, the fifth fixing edge is provided with a ninth mounting hole, the ninth mounting hole is used for being disposed opposite to a tenth mounting hole on the inner side surface of the longitudinal beam, the sixth fixing edge is provided with an eleventh mounting hole, and the eleventh mounting hole is used for being disposed opposite to a twelfth mounting hole on the inner side surface of the rear cross beam.

4. The frame connecting structure according to claim 3, further comprising a first sealing member and a second sealing member, wherein the first sealing member is configured to be disposed between the first connecting member and the frame, and the second sealing member is configured to be disposed between the third connecting member and the frame.

5. The frame connecting structure according to claim 1, wherein the second connecting member further includes a second bearing edge, the third fixing edge and the fourth fixing edge are both connected to the second bearing edge, and the second bearing edge is used for bearing the longitudinal beam and the front cross beam.

6. The frame connecting structure according to any one of claims 1 to 5, further comprising a first pre-assembly for connecting an end of the side rail and an end of the rear rail.

7. The frame connecting structure according to claim 6, wherein a first protrusion and a second protrusion are respectively disposed on two opposite side surfaces of the first package, the first protrusion is configured to be inserted into a first insertion hole on the longitudinal beam, and the second protrusion is configured to be inserted into a second insertion hole on the rear cross beam; or,

the first pre-assembly is further provided with a first end sealing piece, and the first end sealing piece is used for being connected between the first installation seat of the longitudinal beam and the second installation seat of the rear cross beam.

8. A frame is characterized by comprising a front cross beam, a longitudinal beam, a rear cross beam and the frame connecting structure of any one of claims 1 to 7, wherein two ends of the front cross beam are connected with two ends of the rear cross beam through the longitudinal beam respectively and enclose a containing cavity for being installed in a bottom plate structure, a second mounting hole opposite to the first mounting hole and a sixth mounting hole opposite to the fifth mounting hole are arranged on the outer side surface of the longitudinal beam respectively, a fourth mounting hole opposite to the third mounting hole is arranged on the outer side surface of the rear cross beam, and an eighth mounting hole opposite to the seventh mounting hole is arranged on the outer side surface of the front cross beam.

9. The frame according to claim 8, wherein a first mounting seat is provided on an inner side surface of the longitudinal beam, a second mounting seat is provided on an inner side surface of the rear cross beam, and a first guiding structure is provided on an end of the first mounting seat or the second mounting seat, and the first guiding structure is used for guiding the longitudinal beam or the rear cross beam in and enabling the longitudinal beam and the rear cross beam to be matched with each other.

10. A lower shell comprising a floor structure and the rim of claim 8 or 9, said floor structure being received within said receiving cavity and being connected to said front cross member, said side members and said rear cross member.